Insert for anchor bolts



Oct. 22, 1929. H. A. SELAH INSERT FOR ANCHOR BOLTS F1193 Jan. 16. 1926WITNESSES:

INVENTOR Howard Ase/ah BY WM Patented Oct. .22, 1929 UNITED STATESPATENT OFFICE HOWARD A. SELAH, OF HOMEWOOD, PENNSYLVANIA, ASSIGNOR TOWESTINGHOUSE ELECTRIC 81: MANUFACTURING COMPANY, A CORPORATION OFPENNSYLVANIA.

INSERT FOR ANCHOR BOLTS Application filed January 16, 1826. Serial No.81,674.

My invention relates to inserts for anchor bolts and particularly toinserts adapted to be imbedded in concrete walls or floors.

An object of my invention is to provide an insert that may be embeddedin a wall or floor and that is adapted to detachably secure an anchorbolt. 2

Another object of my invention is to provide an insert that is adaptedto permit adjustment of the bolt in the plane of the floor or wall inany direction within the limits of the device.

A further object of my invention is to provide a simple and inexpensiveinsert for anchor bolts that may economically be made of malleable ironcastings, that requires no machining operations, and that may readily besecurely imbedded in a concrete wall or floor for detachably receivingan anchor bolt.

The present invention is directed to an insert for anchor bolts thatcomprises a cuplike casing adapted to be embedded in concrete, a boltreceiving portion having a T-slot for engaging a bolt-head and adaptedto be so turned as to lock the bolt in place, and a spring forresiliently supporting the bolt receiving portion.

In the drawings, Fig. 1 is a view in vertical section of a deviceembodying my invention imbedded in concrete and with a bolt in place;

Fig. 2 is a view partially in plan and partially in section of thedevice shown in Fig. 1, the parts being in position to receive abolthead;

Fig. 3 is a plan view of the device showing the parts in position toretain and center the bolt-head;

Fig. i is a plan view of the bolt-retaining member;

Fig. 5 is an elevational view of the boltretaining member of Fig. 4.

Referring to the drawings, the insert or socket comprises, in general, acup-shaped casing or socket portion 1, a central or boltretainingportion 2, a spring 3, a cover member 4.- and a supporting dlsc orwasher 5. Gylindrical surface 6 of the body portion 1s provided with aplurality of radial Webs 7 extending from the top of the body andterminating in an annular flange 8 at the bottom thereof. The webs 7 anda flange 8 which are imbedded in concrete, serve to retain the casingtherein. An inwardly extending annular flange 12, having a discontinuityor notch 13 is spaced from the end of the casing 1 to provide a recessedseat 14 for receiving the supporting or centering washer 5.

The central portion, or bolt-retaining member 2 comprises a disc 15having a T-slot 16 that extends transversely of the disc, theoverhanging portion 17 of the slot being cut away at one end to providean enlarged opening 18 for receiving the square head of a bolt 19 whilethe bolt is in the position indicated by dotted lines in Fig. 1. Thedisc 15 is provided with a shoulder 21 that engages with the annularflange 12, thus retaining the center portion 2 within the casing 1.

The shoulder 21 and the annular flange 12 are provided with coactingradial notches 22 that are adapted to engage and prevent the rotation ofthe bolt retaining member 2 while the bolt is being tightened intoplace. The bolt retaining member 2 is also provided with a boss 23 whichserves to center the spring 3 in position between the bolt retainingmember and the cover member 4:. The spring 3 serves to maintain theshoulder 21 in engagement with the annular flange 12 while the bolt 19is being tightened.

The device is assembled by simply placing the bolt retaining member 2and spring 3 in place and pressing on the pressed steel cover 4. Toinsert a bolt, the bolt retaining member 2 is rotated within the casinguntil the opening 18 corresponds or registers with the discontinuity 13,as shown in Fig. 2. The bolt-head may then be inserted in the boltretaining member 2 and rotated to some position as in Fig. 3 in suchmanner that the an nular flange 12 prevents the removal of the boltthrough the opening 18. The slotted retaining washer 5 may then be putin place in the recessed seat 14. To secure the inserts in a concretefloor or wall, bolts are first inserted in the retaining member andcentered by disposing the slot in the supporting member 5 at rightangles to the slot in the bolt retaining member 2. The inserts may thenbe fastened to a template which is designed to properly space them.Concrete is then formed around the insert which is imbedded securelytherein when the concrete hardens.

In securing the machine or bracket, it is oftenfound-that the coredholes in the feet or braces are not accurately spaced so that it isnecessary to secure some means of adjustment. This adjustmentmay beobtained by rotating the bolt retaining member 2 and the supportingwasher 5 in such manner that the bolt is free to move transversely inthe direction necessary to compensate forthe inaccurate spacing of thebolt holes. In case the foot of the machine is large, it is notnecessary to use the supporting washer 5 as the foot may be supportedupon the floor or wall or upon the upper face of the insert. However, incase the foot is of smaller diameter than'the supporting casing 1, it isnecessary that the supporting washer 5 bev used.

It is thus apparent that I have invented an insert or socket for anchorbolts that is'char- .acterized by being simple and inexpensive tomanufacture and that is adapted to detachably retain a bolt and allowadjustment of the bolt in the plane of the wall or floor,

While I have'described but one embodiment of the invention, it will beapparent to those skilled in the art that various changes,modifications, substitutions, additions and omissions may be made in theapparatus therein-i1lustrated Without departing from theispirit andscope of .the invention as set forth in the appended claims.

*I claim as my invention:

' 1 1. An anchor for bolts comprising a member-having an undercut sockettherein, a rotatablemember having a T-slot extending transversely of theaxis of rotation retained within thesocket and resilient means formaintaining the rotatablemember in engagement with the undercut socket.

2. An insertfor anchor bolts comprising a member havmg a socket therein,a bolt-retaming member rotatably secured within the socket and havinganundercut slot for receiving .the head of a bolt and supporting it inadjusted positions andresilient means for maintaining the bolt-retainingmember in engagement with the socket and in the adj ust-ed position.

3. An insert for anchor bolts comprising a member having asockettherein, a bolt-re memberhaving an undercut socket therein, arotatablemember retained within the socket and having an undercut slot extendingtransversely of the axis of rotation of the member for receiving andretaining the head of a bolt in adjusted positions and a resilientmember for maintaining the rotatable member in engagement with theundercut socket.

5. In an anchor for bolts, the combination with a disc member having anundercut slot cut in from one edge thereof for receiving the head of abolt, of a member for rotatably supporting the disc and having a portionoverlapping the end oi the slot for preventing removal of the bolt fromthe slot by movement in a transverse direction and a resilient memberfor maintaining the disc in engagement with the supporting member.

6. An insert for anchor bolts comprising a cup-like casing having aninwardly extending annular flange, said flange having a discontinuitytherein and having teeth on one face thereof, a movable member withinthe casing having a T-slot therein and being fitted with teeth forengaging the teeth on the annular flange, and resilient means formaintaining the movable member in engagement with the flange.

7. In an insert for anchor bolts, the combination with a disc memberhaving an undercut slot for receiving and retaining the head of a bolt,of a member having an undercut socket for receiving and retaining themembers therein for rotary movement and provided with a notch forregistering with the undercut slot for permitting the insertion of abolt head and a resilient member for maintaining the disc member inengagementwith the undercut socket.

8. A bolt socket for insertion in a hardening material comprising acup-like casing having an inwardly extending annular flange, said flangebeing spaced from the end of the casing to provide a recessed seat, aslotted supporting plate adapted to be supported by the seat, and amovable slotted bolt-retaining member within the casing for engaging theinner side of the flange.

9. A bolt socket for insertion in a hardening material comprising acup-like casing having an inwardly extending annular flange, said flangebeing spaced from the end of the casing to provide a recessed seat, aperforated supporting plate adapted to be supported by the seat, andamovable bolt retaining member within the casing for engaging the innerside of the flange.

In testimony whereof, I have hereunto subscribed my name this 31st dayof December, 1925.

HOWARD A. SELAH.

